JPS58205788A - Typewriter - Google Patents

Abstract

PURPOSE:To obtain a typewriter which can automatically perform marginal setting, by providing paper detectors on the right and left sides of a carrier provided in a carrage, and computing the width of the paper based on the signals from the detectors and the step signal from the carriage. CONSTITUTION:Guide pieces 15a and 15b, which are protruded from both sides of a carrier 15 attached to a carriage 8, guide typewriter paper 1 to a bail roller 5. Noncontact type typewriter paper detectors 18a and 18b comprising reflecting type photosensors and the like are provided in the guide pieces 15a and 15b. The presence or absence of the paper 1 and the width of the paper are detected during the period the carriage 8 moves from a home position to the other end in front of a platen 2. The width of the paper 1 is computed from the detected values and the marginal setting is automatically performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a margin setting mechanism that defines the printing range of a tie writer, and its purpose is to properly and easily set margins for type paper of various widths. The purpose of the present invention is to provide a tie 1 lighter equipped with a mechanism that allows the following.

The margin sector that defines the printing range of a typewriter is left to the typist. Typists set the margins on the type paper loaded on the platen, but this happens each time they start printing, whether it is for a single sheet or for multiple sheets. There are many
To change the margin set, move the carriage to the paper position and operate the new margin set. In many printing operations, there are various types of printing in addition to standard line printing, and changing the margin set each time not only reduces work efficiency but also increases the burden on the typist. In view of this point, the present invention intends to provide a tie writer equipped with a mechanism that allows margin setting to be performed reliably and easily.

Embodiments of the present invention will be described with reference to the drawings. In Fig. 1, 1 is type paper in the longitudinal direction (axial direction) of platen 2.
inserted from. 3 is a type paper rear feed roller, 4
5 is a front side feed roller, and 5 is a pail roller, which are separated from the platen 2 when the type paper 1 is inserted. A stopper 6 regulates the position of the leading edge of the type paper 1 inserted from the axial direction of the platen 2. Reference numeral 7 denotes an arc-shaped guide plate that guides the supplied type paper 1 under the front feed roller 4. Reference numeral 8 denotes a carriage on which a printing mechanism is mounted, and is moved along the platen 2 by sliding a carriage shaft 9 in its axial direction. 10 is a driving belt.

Reference numeral 11 denotes a type selection motor mounted on the carriage 8, to which is attached a type wheel 16 having Vj on its rotating shaft and a large number of elastic spokes radially having a type 12 at its tip. 14 is a printing hammer mounted on the carriage 8. Several guide pieces 15α are provided on the 1st carriage 8 and protrude from both sides of the carrier.
15.6 guides the tap paper 1 to the pail roller 5.

16 is a tab paper receiving plate, 17Fi is an exterior case.

Protruding guide pieces 15α and 156 at both ends of the carrier 15
Non-contact type paper detectors 18α and 18b made of reflective photosensors or the like are attached to the mounts. This detector 1
8α and 18b detect the presence or absence of type paper and its width by moving the carriage 8 in front of the platen 2 from the home position (left end in FIG. 2) to the rightmost end.

In FIG. 2, A is the maximum center of the type paper, and B is the detection range of the detectors 18α, 186. The width of the type paper is calculated by the logic control circuit according to the timing of the detection signals of the detectors 18α and 18b and the drive step signal counted by the amount of movement of the carriage 8, and the data is stored in the margin set memory. Injected.

Margin setting is automatically performed in response to a margin set signal when paper feeding to the platen 2 is completed, during the paper feeding process, or during printing, according to a program formed in the margin set memory.

3 and 4 show type paper detectors 18α, 18.
6 specific examples are shown. Figure 3 shows platen 2
The type paper 1 fed to is placed under the guide plate 7 at position 17.
During the paper feeding process, the paper feeding operation is temporarily stopped and type paper is detected. Detector 18g on guide plate 7
, 18 are provided with a large number of detection holes 19. 4th time When the type paper 1 fed to the platen 2 is slightly exposed from the guide plate 7, the paper feeding operation is temporarily stopped during the paper feeding process and the type paper is detected. There is no need for hole 19.

As described above, the typewriter of the present invention includes a carrier 15 for guiding type paper and a printing mechanism, and the type paper is placed on both left and right sides of the carrier 15 of the carriage 8 that moves in the axial direction along the platen 2. Detect presence 1
A pair of detectors 18α and 18A are provided, and the margin setting is automatically performed by calculating the width of the paper sheet at the evening timing of the detection signal of the detector and the driving step signal generated by the sicant based on the amount of movement of the carriage 8. Feature 5- is to form a program that performs the following tasks.

Since the tie lighter of the present invention has the above configuration, it has the following effects. (1) Some conventional electronic typewriters store margin sets in memory, but these require margin sets to be set for various different printing forms other than standard line printing and type paper. Therefore, operation and reading are complicated.

On the other hand, when the typewriter L of the present invention is fed, the detectors 18α and 185 detect the positions of both ends of the type paper, calculate the inside of the paper, and form a margin set program. Finish the margin set by simply inputting the set number of both margins using the keys.

The typist's effort required for margin setting is thus significantly reduced, achieving the object of the invention stated at the outset. (2) When the detectors 18α, 186 do not detect type paper, the operation of the printer printing mechanism can be stopped or the absence of type paper can be displayed. (3) Automatic type paper feeder 6- By interlocking with the type paper, it is possible to automate the type writer more effectively.

[Brief explanation of the drawing]

1N: A side view of essential parts of the typewriter of the present invention. FIG. 2: A front view of FIG. 1. FIG. 6: A diagram showing the relationship between the detector and the tape paper. Perspective view from the side, ←) #J, side view Figure 4: 1llt front view of another embodiment showing the relationship between the detector and type paper [Symbols] 1...Type paper, 2...Graten ,3・
... Rear side feed roller, 4... Front side feed roller, 5...
・Pail roller, 6... Stopper, 7... Guide plate, 8... Carriage, 9... Carriage shut,
10... Drive belt, 11... Type selection motor,
12...Print type, 13...Print wheel, 14...
Printing hammer, 15... carrier, 1.6... receiving plate,
17...Exterior case, 181Z, 18h...Detector, 445-

Claims (1)

[Claims] A carriage is provided with a carrier for guiding type paper and a printing mechanism, and moves in the axial direction along the platen.A pair of detectors for detecting the presence or absence of type paper is provided on both left and right sides of the carrier. A tie writer characterized in that a program is formed to automatically set margins by calculating the width of a sheet of paper based on the timing of a detection signal and a drive step signal that is sycranted based on the amount of movement of the carriage.